I'm using commit 51be352 and getting the following error when trying to do training:

...
I1020 15:24:48.951339  3162 caffe.cpp:121] Optimization Done.
*** Error in `/opt/caffe/build/tools/caffe': double free or corruption (out): 0x0000000001db6160 ***
Aborted (core dumped)

To reproduce the error:

• $ git clone https://github.com/tleyden/caffe.git
• $ git checkout feature/alpha_example
• $ cd caffe/data/alphabet_classification && ./get_alpha.sh
• $ cd caffe/examples/alphabet_classification && ./train_alpha.sh

Here are the caffe configuration files and training data I'm using:

• alpha_solver.prototxt
• alpha_train_text.prototxt
• alpha_training_images.txt
• training data zipfile ~100k

The image set consists of 28x28 greyscale images of 0-9A-Z (36 classes in all), generated with a few different fonts.

I suppose there is something wrong in my configuration or training data (I'm a caffe Noob), but the reason I'm filing a bug is that:

• I wouldn't expect caffe to crash.
• If caffe is going to crash, it should at least give me a better and more actionable error message.

Would be very interested in hearing what I need to change in my configuration / training set to avoid this error, but also think it's an opportunity to make caffe more robust.